Safety guard for pneumatic chipping hammers and the like



SAFETY GUARD FOR PNEUMATIC CHIPPING HAMMERS AND THE'LIKE Filed March 12,1940 1720622322": 7 0 TPHN PLATECK, 2/ 20 Z,

i use 01' workmen It has been were intended.

thehammerr a; i i i It is an objectofthe present invention to provide asimple and inexpensivesajfety guard which will encourage its use andprotect other workmen Pa niJA r, 4, 1942 1 a 2380,0651) "I N l r pSAFETY GUARD non rnnuminocmrrmo it nammasannrnnnmaa w-eta. om

This invention relatestoa safety device and the like.

Heretoiore; operatorsofjpneumatic chipping hammers andthelikeusuallywore goggles to protect their eyes from injury,due toflying chips or other foreign particles; While goggles aresatisfactoryand are a good protection mr the eyes, they do notprotect"theface andother parts particularlyto animproved safetyguard ior'thewopera-tingflchipping hammers and which, my invention may GClaims. cLjao-issy p M invention will be more apparent in the course or. thefollowing specification and will be particularlypointed out in theappended claims. I

In the} accompanying drawing there is shown, for thepurposeof,illustration, one embodiment assume in practice.

In'thlsdrawing:l 1 i Figured is a side elevation of a pneumatic of thebody of the operator from injury, nor

nearby workmenengaged in other duties. Also,

it is neoessary for the chipping hammer operators to wear gogglesthegreater part ofthe day, and

after contlnuoususe over suoha longperiod of time.

directly to the body or barrelof the pneumatic hammer, but such guardsareunsatisfactory in proposed to attach safety guards that thesupportfor the guards is positioned too far fromthe" point of cutting and theguards are readily forced outof adjustment and from over the point ofcuttingorchipping due to the vibration of i the hammer which is, ofcourse, unsatisiaotory. Further, such guards 'attached to the hammermade thehammerjbulky and oftentimes interfered with the operationthereof, thereby of course defeated the purpose for which they Accordingto thepresent invention, there is tending todiscouragetheir useentirely,which 3 provided animproved safety guard which is at alltimes maintainedin position directly over the workpiece and thelcutting tool and, atthe. same time, one which does not interfere with the cutting orchipping l perationj and the use of in the immediate vicinity aswellasthe operator.

It is another objector the inventionto provide a safetyjguard for usewith chipping hammers and the likewhich will deflect the chips or otherforeignparticles downwardly, away from the work, immediately after theyleave the sur face thereof, thereby eliminating the dangerof the chipspiling upand obscuring the work.

It is a further objector the invention to pro vide a safety guard jwhichwill permit a near; vision of the workingjtool and the work at alljtimes and, at the sametime, ,provide'aguard which iseflective in itsuse.a

Various other objects and advantages of this they become quiteuncomfortable to thewearer 1 foreign particles struck up byworkingtoolwith which it is tobe used. There is disposed in the top of thedeflecting portion 8 man is adapted toview the end of the workinghammerin use, showingthe improved safetyguard offmy inventionincorporated therewith and theuse thereof; l Flgure2 is an enlarged sideelevation, partly in sectiomishowing my improved safety guards assembledon the shank of the cutting tool; Figure 3 is a plan view thereof;Figure 4 is a plan viewshowing a slight modification i thereof;

fFlgure fi is a side elevation similar to Figure 2, showing a modifiedform of safety guardof my invention; and, a

Figure 6 is a. plan view thereof.

Referring more particularly to the drawing, the preferred embodiment ofthe safety guard ofmmy" invention as shown in Figures 1 and 2 of thedrawing, comprises a longitudinally extending inherently resilientfframemember 2 which is preferably made of spring steel oi-l any othersuitable resilient sheet metal. The inner end 3 of the frame 2 issecurely attached to a pliableannular member, preferably a short lengthof rubber hose l,by-mearis of therivet Sex in any other suitable manner.The pliable member or rubber hose 4 should have an interior diameterslightly less than the shank 6 of the working tool I with which it istobe used asit is adapted to flt tightly therearound: Also, it ispreferable that the innerend 3 of the frame 2 be disposed within theannular memberor length of rubber hose betweenfthe; same and the shank 6of the working tooljso astoyaid in supporting the same. A-por'- non; ofthefram 2 adjacent th inner end thereofis bent downwardly on each sidethereof as at 8, soas to fit partially around the outer surface of theshank of the working toolso as to aid in preventing the frame 2 fromtwisting or turning relative thereto. 1

i There is arranged "toward the outer end of the frame 2, arelativelywide deflecting portion 8 of such width as to properly deflectthe chips, or the particular substantially centrallyfthereof, alongitudinally extending opening Iii through which the workin thedeflecting portion 9 of the frame 2. The wire mesh may be welded orotherwise suitably attached to the frame with the mesh of the wire beingsmall enough to prevent the chips and other pieces of foreign particlesfrom passing therethrough. A one-fourth inch wire mesh has been found tobe satisfactory for most purposes as it permits a clear visiontherethrough of the end of the working tool and the workpiece and, atthe same time, properly deflects the chips so as to protect theoperator. A guard of such construction is preferable for use whenextremely small chips are thrown off by the working tool.

In Figures 5 and 6 of the drawing, there is' shown another modificationof the safety guard of the present invention. In this construction, theframe member is made preferably of a piece of inherently resilient wireI 5 properly bent upon itself, and formed into the shape as shown inFigure 6, or in any other suitable shape. The inner ends l6 of the wireare securely attached as before to an annular pliable member preferablya length of rubber hosing Il. The ends l6 of the wire preferably extendwithin the length of rubber hosing between the same and the shank 6 ofthe working tool 1, as in the preferred embodiment, and the ends arepreferably bent upwardly as at [8 so as to be disposed in holes l9arranged through the wall of the rubber hose so as to preventdisplacement of the frame.

The outer free end of the wire is bent backwardly upon itself so as toprovide a relatively wide loop portion 20. There is arranged over theloop portion 20 preferably a wire mesh 2| so as to provide a deflectingshield portion on the end of the frame. The outer free end of the loopportion 20 is preferably bent outwardly and downwardly as at 22 which isadapted to rest upon the surface of the workpiece during the chippingoperation.

In operation, the pliable annular member or I rubber hose 4 is slippedover the endof the working tool or chipping chisel with which the guardis to be used and properly positioned on the shank thereof so that theend of the working tool or chisel and the workpiece can be properlyviewed through the opening in the same. In starting the working tool orchisel, it is usually positioned at a small angle with the vertical andin this position, the extreme outer free end of the shield, namely, theportion l3 as shown in the embodiment of Figures 1 through 4 of thedrawing, and the portion 22 of.-the embodiment as shown in Figures 5 and6 of the drawing, ex-

tends a slight distance beyond the end of the cutting tool and point ofcutting and will bear upon the surface of the workpiece. As the cuttingoperation progresses, the working tool of course is lowered andapproaches the horizontal and the outer free end of the deflectingshield or guardis still maintained in contact with the surface of theworkpiece due to the inherently resilient characteristics of the frame.That is,

the guard. is always maintained in its proper position over the point ofcutting no matter at what angle the cutting tool is positioned, due tothe resiliency of the frame. Thus, it will be seen that the chips orother foreign particles of metal strike the guard which obstructs thepath with sufficient resistance to neutralize their outward force, anddeflects them downwardly and outwardly, thus eliminating the same frombein deflected toward the body of the operator or towards other workmenin'the immediate vicinity of the cutting or chipping operation.

While I have shown and described an embodiment of my invention andseveral modifications thereof, it will be understood that theseembodiments are merely for the purpose of illustration and description,and that various other forms may be devised within the scope of myinvention, as defined in the appended claims.

I claim:

1. A safety guard for the use of workmen operating pneumatic chippinghammers and the like comprising a longitudinally extending inherentlyresilient deflecting shield member adapted to be positioned over theworking tool of the hammer, a pliable annular member to which the innerend of said shield is securely attached, said annular member. adapted tofit tightly around the shank of the working tool, and an outwardly anddownwardly extending portion arranged on the outer free end of saidshield which is adapted to rest upon the workpiece during the working ofthe tool and to be held thereagainst by the resilient action of saidshield member, said outwardly and downwardly extending portion beingconstructed and arranged sothat the same will rest upon the workpiece ata point beyond the working edge of the tool when the tool issubstantially parallel to the surface of the workpiece and at all timeswhen the tool is in use.

2. A safety guard for the use of workmen operating pneumatic chippinghammers and the like comprising a longitudinally extending inherentlyresilient deflecting shield member, said shield having an openingarranged therethrough in the top thereof adjacent its outer end so as toenable the workman to view the end of the working tool and the workpiecetherethrough, a pliable annular rubber member to which the inner end ofsaid shield is securely attached. said annular rubber member adapted tofit tightly around the shank of the working tool, and an outwardly anddownwardly extending portion arranged on the outer free end of saidshield member which is adapted to rest upon the workpiece during theworking of the tool and to be held thereagainst by the resilient actionof said shield member, said outwardly and downwardly extending portionbeing constructed and arranged so that the same will rest upon theworkpiece at a point beyond the working edge of the tool when the toolis substantially parallel to the surface of the workpiece and at alltimes when the tool is in use.

3. A safety guard for the use of workmen operating pneumatic chippinghammers and the like, comprising a longitudinally extending inherentlyresilient frame member formed of wire, a wire mesh securely arranged onsaid wire frame member adjacent the outer free end thereof so as toprovide a shield for deflecting foreign particles caused by the chippingoperation and to enable the workman to view the end of the working tooland the workpiece therethrough, a pliable annular rubber member to whichthe inner end of said Wire frame is securely attached, said annular likerubber member adapted to m; tightly around the shank of the workingtool, and an outwardly land downwardly extending portion arranged on theextreme outer free end of saidwire frame member which is adapted torestupon the work piece duringv the workingfot the i tool and to be heldthereagalnst by the resilient action of said frame member, saidoutwardly and downwardly extendingportionbeing constructed and arrangedso that the same will restsupon the workpiece at a a a point beyond theworking edgetoi the tool when i the tool-is substantiailyparallel to thesurlace of i outwardly anddownwardly extending portionbethe workpieceandfat all times when the tool is in 4. Awsafety guardior chipping 1tools and the comprising a* longitudinally extending in- "of the toolandthe workpiece therethrough, and

a resilient rubber ring memberjhaving anxinner ,diameter slightlyfilessthan jthevouterdiameteroi the I shank of thetool around which lt lsadapted fttotightly fit, the innerend of said shield-memberJdisposedwithin the rubber ringmernber to which an adapted to bedisposed 1 next to the shankfoi the tool so astobe securely v Vsupported with'ithefouter free end oflsaid shield member adapted to'rest uponthe workpiece dura ing t'neuse thereoi andto be heldthereagainst i a at all timesdueto the resiliency olthe'same.

h w ss q -e et like comprising a longitudinally extending.inner-k it issecurely attached 5. A safety guard for h'erently resilientdeflectingshieldmember adapta to be positioned over a working tool, said shieldmember made from a piece or inherently l resilientjsheetmaterial meansarranged in theouter free end or said shieldtort viewing the end entlyresilient deflecting shield member adapted to be positioned over a,working tool, mean arranged in the outer end of saidshield for viewingthe end of the tool and the workpiece therethrough, a resilient rubberring member to which i the inner end of said shield 3 said ring memberadapted to fit snugly and completely around the shank of the tool, andan outi wardly and downwardly extending portion aris securely attached,

ranged on the outer free end or said shield, said ing constructed andarranged so that the same will rest upon the workpiece at a point beyondthe working edge 0! the tool when the tool is substantially parallel topiece and at all. times when the tool is in use.

6, A safety guard for chipping tools and the "likeoomprislng alongitudinally extending inherlently resilient deflecting shield memberadapted 20 to be positioned over working. tool, means ar t ranged in theouter end 01' saidshield for viewing the end 01 the tool and jpletelyaround the shank wardly and downwardly extending portion arranged on theouteri'ree end or said shield which 1s adaptedto restupon the workpieceat all times,

the workpiece therethrough. a resilient rubber ring member to which theinner end of said shieldis securely attached to flt snugly and comot-thetool. ano'ut said ring member adapted and means carried bysaid shieldwhich is adapted to cooperate witnthe'fworking tool for preventingsidewise tothe tooll' i 3 movement of the shield relative the surface ofthe work-

